Medical Dictionary
portio
noun por·tio \ˈpȯr-shē-ˌō, ˈpȯrt-ē-ˌō\
plural por·ti·o·nes \ˌpȯr-shē-ˈō-ˌnēz\
Medical Definition of PORTIO
: a part, segment, or branch (as of an organ or nerve) <the visible portio of the cervix>
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